This allows device drivers to enable MSI (Message Signaled Interrupts). Message Signaled Interrupts enable a device to generate an interrupt using an inbound Memory Write on its PCI bus instead of asserting a device IRQ pin.

If you don't know what to do here, say N.

Option: PCI_LEGACY_PROC

Kernel Versions: 2.6.15.6 ...

(on/off) Legacy /proc/pci interface

depends on PCI

This feature enables a procfs file -- /proc/pci -- that provides a summary of PCI devices in the system.

This feature has been deprecated as of v2.5.53, in favor of using the tool lspci(8). This feature may be removed at a future date.

lspci can provide the same data, as well as much more. lspci is a part of the pci-utils package, which should be installed by your distribution. See <file:Documentation/Changes> for information on where to get the latest version.

When in doubt, say N.

Option: PCI_DEBUG

Kernel Versions: 2.6.15.6 ...

(on/off) PCI Debugging

depends on PCI && DEBUG_KERNEL

Say Y here if you want the PCI core to produce a bunch of debug messages to the system log. Select this if you are having a problem with PCI support and want to see more of what is going on.